An Effective Modulated Predictive Current Control of PMSM Drive With Low Complexity

Predictive current control (PCC) is an emerging technique offering advantages like easy inclusion of multivariable objectives, nonlinear constraints, and excellent dynamic performance. In the conventional PCC (CPCC), the computational complexity is increased with the increase in the number of voltage vectors (VVs). As the control action gets updated in every control interval, the deployment of fast processors with large data handling capability is inevitable, which limits the real time application of PCC scheme. Further, applying a single VV for the complete sample period causes an increase in the ripples in torque and flux under steady-state operation. This article introduces a duty-modulated PCC scheme with low complexity for the permanent magnet synchronous motor (PMSM) drive, to address the above limitations. The proposed scheme utilizes only three VVs in every sample interval, unlike the CPCC, where seven VVs are employed. This yields a reduction in the number of computations without forfeiting the drive performance. Subsequently, an effective duty-modulation scheme is employed to improve the performance of PMSM drive under steady state, where the application of active and zero VV aid to minimize the flux and torque ripples. In order to affirm the effectiveness of the proposed scheme, comprehensive comparisons are performed with the CPCC and recent literature.